Union



(No MOdBL') 2 SheetsSheet 1.

L. ONDERDONK.

LOOPER MECHANISM FOR SEWING MACHINES. No. 591,548. Patented Oct. 12,1897.

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(NoModeL) 2Shets-Sheet 2.,

LONDERDONK.

LOOPER MECHANISM FOR SEWING MACHINES.

No; 591,543. Patented Oct. 12,1897 I g w g S M K Q m: "Dams memo PHQIOJJTHO wnsumu'rou. n. c.

UNIT STATES PATENT OFFICE.

LANSING. ONDERDONK, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS.

LOOPERfMECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Fatent N0. 591 ,543, dated October 12, 1897.

i 7 Application filed April 6, 1896. Serial No. 586,312. (No model.) I

To all whom it may concern.-

Be it known that I, LANSING ONDERDONK, a citizen of the United States, residing at Boston, in the county of Sufiolk, State of Massachusetts, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a description, reference being had to the accompanying drawings and to the letters of reference marked thereon.

My invention relates to an improvement in sewing-machines, and particularly to that class in which a double chain-stitch is formed by means of an eye-pointed needleand a cooperating thread-carrying looper; and my object is to provide a machine of the class referred to which will be comparatively simple in construction, yet very effective in operation and capable of running at a very high speed.

The present invention has been specially designed for use upon a machine in which the feed moves in a path longitudinally of the bedplate of themachineJ The invention in one of its presentations comprises a main shaft formed at one portion with an inclined crank, and having also an eccentric combined with a looper-supporting shaft extending longitudinally of the bedplate of the machine and connected at its rear end with what may be called a looper-operating frame or rocking fork, having wings or flanges embracing the inclined crank, and having rearward of the wings or flanges an opening, constituting a yoke in which the cocentric onthe main shaft works, and thus in the rotation of the main shaft a rocking and reciprocating movement is given to the loopersupporting shaft.

The invention further includes various matters hereinafter described, and set forth in the appended claims, the above brief statement being intended simply as a general description of the character of the machine and not in any respect meant as a limitation upon the claims.

In the accompanying drawings, which illustrate the invention, Figure l is a sectional plan view of a sewing-machine embodying the invention. Fig. 2 is a side view of the looper-fork crank-bearing. view of the looper-fork. Fig. 4 is a side elevation of my invention.

In the drawings, A represents the standard of the machine, having a suitable base to be secured to the bench or table, this being substantially the same as the standard shown in the well-known Union Special side-wheel cylinder-machine. This standard incloses the greater portion of the operating mechanism and has extending at a right angle to it a casin g B, forming the bed-plate of the sewingmachine, this bed-plate being herein shown as cylindrical in shape and containing the looper and feed dog with their operating parts. The main shaft C is supported in bearings in the standard A and carries on one end a belt-wheel, which receives power from any suitable source. One of the bearings for the main shaft C is composed of a removable sleeve D, secured in the wall of the standard and adapted to be held in place bythe screws a, this bearing being removable and adjustable by reason of the peculiar shape of the main shaft,which is hereinafter referred to. This shaft, at the point 17, is bent out of its plane, forming the inclined crank c, which rotates between the wings or flanges d ofthe rocking fork E, provided with an opening ein the rear, thus forming a yoke, and within this yoke an eccentric F on the main shaft works.

This rocking fork, termed in the claims a looper rocking frame, is provided with the projecting tubular portion f, forming a clamp in which is secured, by suitable adj usting-screws g, the rear end of a shaft G, which extends throughout almost the entire length of the bed-plate or casing Band carries on its outer end loopers h, herein shown as two in number and cooperating with needles '5, set in a vertical plane oblique to the line of feed, which in this instance is longitudinal of the casing of the bed-plate. It will be seen by the construction of the frame E, inclined crank c, and eccentric F that in the rotation of the main shaft a rocking and reciprocating movement is given to the looper-supporting shaft G, the rocking movement being the movement which takes the loop of needle-thread and the reciprocating movement that which en ables the Fig. 3 is an end loopers to avoid the needles. 13y turning the looper-supporting shaft Gin the clamp f it will be seen that the position of the loopers with respect to the needles may be varied, and thus the time in which the loopers take the needle-loops may be changed at will.

I11 Fig. 4: I have shown a take-up mechanism similar to that in the application filed by me on the 23d of January, 1896, Serial No. 57 6,594, in which the needle-operatin g lever is provided with a downward extension having a forked piece attached thereto, with a guiding-eye on each arm of the fork, a stationary cam Z, secured to the machine-frame and intersecting the horizontal plane of the guidin g-eyes with a nipping device m,secured also to the machine-frame, said nipping device including a spring-plate adapted to be engaged in the movement of the needle-lever by a projection 91 thereon, whereby the plate is compressed and the thread gripped to allow the slack to be taken up without pulling off thread from the spools. It will be understood, however, that I do not wish to be limited to this construction, as the same take-up arrangement may be used in this machine as illustrated in the said Union Special machine referred to, wherein the main shaft is extended and provided with take-up and slack-controlling devices. While the feeding mechanism may be the same as that shown in the above-referred-to Union Special machine I prefer to use the arrangement illustrated herein, in which the major portion of the operating parts are included within the rear standard, thus allowing for regulation of the length of stitch within the body of the standard and doing away with the bulging portion at the rear end of the arm or cylindrical bed-plate, which is necessary in said Union Special side-wheel machine. The feed-dog-carrying bar is shown at H and is arranged above the looper-shaft. To it is pivotally connected, at I, the feed-lever-connecting rod K, this connecting-rod at its rear end being provided with a sleeve or collar L,fitting over a bolt M, adjustable up and down in the curved upright slotted piece N, forming a part of the feed-rocking sleeve or crank 0, supported on cones 0, connected to the feed fork p, embracing the eccentric P on the main shaft. For raising or lowering the connection between the feed connecting-rod and the fork-arm I provide a vertical screw q, in the movement of which the point of connection of the feed-lever rod with the upright slotted arm may be adjusted up and down to vary the amount of throw of the feed-lever. The up ward and downward movement of the feedlever is given by means of a cam Q, arranged near the outer end of the looper-supporting shaft. The feed-lever H slides in the bearing on the upper part of the standard, in which the looper-shaft has its bearing.

Various minor modifications and changes in the construction of this device may be made without departing from the spirit of my invention. Furthermore, I do not wish to be understood as limiting myself to the precise details of construction herein shown and described, as many modifications and changes in the construction of the various parts may be made Without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A sewing-machine comprising a main shaft, a looper-supporting shaft extending at a right angle thereto, a suitable bed-plate inclosing the same, a feeding device working longitudinally thereof, a frame to which one end of the looper-supporting shaft is connected having wings and a yoke, said main shaft having a crank working between said wings to vibrate the looper-shaft, and an cecentric working in the yoke to give longitudinal sliding movement to the looper-supporting shaft; substantially as described.

2. In a sewing machine, a main shaft formed at one portion with an inclined crank and having also an eccentric combined with a looper-supporting shaft extending longitudinally of the bed-plate of the machine, a looper-rocking frame to which the looper-s11 pporting shaft is connected at its rear end and having wings embracing the inclined crank and having rearward of the wings an openin g constituting a yoke in which the eccentric on the main shaft works, whereby in the rotation of the main shaft a rocking and reciprocating movement is given to the loopersupporting shaft; substantially as described.

3. In a sewing-machine the combination with the needle and operating mechanism, of a looper-carrier comprising a shaft extending lengthwise of the machine bed-plate and carrying near its outer end a looper, and having at its rear end wings and a yoke, and a r0- tating shaft having means for engaging the yoke and wings; substantially as described.

4. A sewing-machine comprising a bedplate and stitch-forming mechanism, the latter including a sliding and rocking loopercarrier, comprising a long shaft extending longitudinally of the bed-plate and carrying the looper and having the rocking frame at the other end provided with a yoke; substantially as described.

5. In a sewing-machine having a cylindrical bed-plate, a transverse main shaft,having a crank and an eccentric thereon, a loopercarrier having wings and a yoke engaging re speetively the crank and eccentric, and having a rigid portion extending longitudinally of the bed-plate, and a looper secured thereto; substantially as described.

6. In a sewing-machine a main shaft, having a crank and an eccentric thereon, a looperrocking frame having wings and a yoke engaging respectively the crank and eccentric, and having a laterally-extendin g tubular portion, and a looper-supporting shaft carrying a looper and removably and adjustably se-- -cured within said tubular portion; substantially as described.

7. In a sewing-machine a rotating shaft having suitable supporting-bearings and having an inclined crank and an eccentric, a

looper-carrier having wings and a yoke, which engage respectively the inclined crank and eccentric and having a rigid laterally-projecting portion on one side only and a looper secured to said rigid projecting portion; substantially as described.

8. Ina sewing-machine, the main shaft, the looper-supporting shaft with connections between the two for reciprocating and oscillating thelatter, a feed-dog-carrying bar, a rocking frame to which the same is attached, and a cam reciprocating and oscillating-with the -looper-supporting shaft and engaging the feed-dog-carrying bar for raising the same, andv means for oscillating the said rocking frame; substantially as described.

9. A sewing-machine comprising a rear transverse standard, a main shaft supported thereon, a feed-rocking frame also entirely vsupported within said standard, a looperrocking frame within the same and operatively connected to the main shaft, a bed plate or casing extending at right angles to the rear standard and inclosing a feed-dogcarrying bar and reciprocating and oscillating looper-supporting shaft which, at their rear ends, extend into the rear standard and are operatively connected to the feed-rocking frame and looper-rocking frame, respec tively; substantially as described.

7 10. A sewing-machine comprising a driving-shaft, a bed-plate, and a looper-operating devicecomprising a shaft extending longitudinally of the bed-plate and having at its inner end a frame, an inclined crank operatively engaging the frame to give an oscillating motion to the shaft and means for rein bearings on the machine-frame and having a reciprocatory and oscillatory motion, a rocking frame to which the looper-supporting shaft is attached, and a rigid crank and coand the driving-shaft; substantially as described.

12. A sewing-machine comprising a driving-shaft, a bed-plate, and a looper-operating device comprising a shaft extending longitudinally of the casing, and having at its innerend a frame, and means carried on the driving-shaft directly engaging said frame to give said oscillatory and reciprocating movements; substantially as described.

13. In the herein described sewing-machine, the driving-shaft provided with the rigid integral inclined crank and an eccentric, both arranged between the bearings thereof the looper-supporting mechanism having a rocking frame connected with the crank and with the eccentric for reciprocating and oscillating the looper; substantially as described.

14. A sewing-machine comprising a driving-shaft, a bed-plate and a looper-operating device comprising a shaft extending longitudinally of the bed-plate and having at its centric connection between the rocking frame inner end, a frame, and an inclined crank and eccentric operatively engaging the frame, and operated from the driving-shaft,substantially as described.

In testim ony whereof I affix my signature in presence of two witnesses.

LANSING ONDERDONK.

Witnesses:

CHESTER MoNEIL, WM. H. MYER. 

